Riverbed SteelHead 5080, Руководство по установке и настройке

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26 | Installing and Configuring the SteelHead
Choosing a network deployment
Before you begin the installation and configuration process, you must select a network deployment:
• Physical in-path - In a physical in-path deployment, the SteelHead is physically in the direct path
between clients and servers. The clients and servers continue to see client and server Internet
Protocol (IP) addresses. In-path designs are the simplest to configure and manage, and the most
common type of SteelHead deployment, even for large sites.
Figure 3-1. Physical in-path deployment
• Virtual in-path - In a virtual in-path deployment, the SteelHead is virtually in the path between
clients and servers. Traffic moves in and out of the same WAN interface, and the LAN interface is not
used. This deployment differs from a physical in-path deployment in that a packet redirection
mechanism, such as a SteelHead Interceptor, WCCP, policy based routing (PBR), or Layer-4
switching, directs packets to SteelHeads that aren’t in the physical path of the client or server. For
details on the redirection mechanisms, see the
SteelHead Deployment Guide .
Figure 3-2. Virtual in-path deployment
• Out-of-path - In an out-of-path deployment, the server-side SteelHead is not in the direct path
between the client and the server. In an out-of-path deployment, the SteelHead acts as a proxy.
This type of deployment might be suitable for locations where physical in-path or virtual in-path
configurations aren’t possible. This deployment requires only a SteelHead primary interface to
connect to the network. The SteelHead can be connected anywhere in the LAN.